DE102016010906B3 - Coolant cooler for a motor vehicle - Google Patents

Abstract

The invention relates to a coolant radiator (1) for a motor vehicle for the direct cooling of a coolant, which can be acted upon in a flow direction with a cooling air flow along a cooling air path. It is provided that the coolant radiator (1) has two coolant part coolers (3, 4) which in each case have a first coolant collecting box (5, 8), a second coolant collecting box (6, 9) and a plurality of the coolant collecting boxes (5, 6, 8, 9) fluidly interconnecting and parallel to each other arranged radiator tubes (7, 10), wherein between each two of the radiator tubes (7, 10) is a cooling air passage (11, 12) for the cooling air flow, and wherein the coolant subcooler (3, 4) arranged in the direction of flow one behind the other and in a displacement direction perpendicular to the direction of flow against each other are displaced, so that in a first position of the Kühlmittelteilkühler (3, 4) to each other, the cooling air ducts (11, 12) of the Kühlmittelteilkühler (3, 4) a first overlap and in a second Position have a second overlap with each other, wherein the through the cooling air channels (11, 12) of the two coolant part cooler (3, 4) extending cooling air path in the first overlap has a first flow cross-section and in the second overlap a second flow cross-section.

Description

The invention relates to a coolant radiator for a motor vehicle for the direct cooling of a coolant, which can be acted upon in a flow direction with a cooling air flow along a cooling air path.

The coolant radiator is for example part of a coolant circuit of the motor vehicle and serves to cool the coolant, which is at least temporarily circulated in the context of the coolant circuit. The coolant radiator is designed for direct cooling, so it is arranged on the motor vehicle, that it is acted upon by the at least temporarily driving-induced cooling air flow. The drive-induced cooling air flow occurs during a drive of the motor vehicle. Alternatively or additionally, the cooling air flow can be generated at least temporarily by a fan or the like.

The above-mentioned cooling circuit containing the coolant radiator has at least one device to be cooled, but in particular a plurality of devices to be cooled. These can sometimes differ significantly in their cooling requirements. Thus, during operation of the coolant circuit may result in different heat loads, which must be given by means of the coolant radiator to an outside environment of the motor vehicle. For extreme operating points, such as a drive of the motor vehicle with maximum driving speed at high ambient temperatures, the cooling circuit requires its maximum cooling capacity. Accordingly, it must be subjected to a maximum cooling air flow.

In moderate driving conditions, for example, a medium-speed overland drive without incline, the cooling circuit is theoretically oversized, so that in principle the cooling air flow can be reduced. For this purpose, an adjustable cross-section adjustment can be provided. By reducing the cooling air flow by means of the cross-section adjustment element, the cw value of the motor vehicle can be improved, and thus ultimately a fuel consumption of the motor vehicle can be reduced. The cross-section adjustment element is arranged, for example, on a decorative grille of the motor vehicle or on the coolant radiator itself. However, such a configuration requires a comparatively large space.

From the prior art, for example, the publication DE 10 2004 047 583 A1 known. This relates to a heat exchanger assembly, in particular radiator arrangement for the front region of a motor vehicle, with a heat exchanger. It is provided that the heat exchanger is in several parts in the form of heat exchanger elements, namely at least one main heat exchanger and at least one secondary heat exchanger is formed, wherein at least two of the heat exchanger elements are arranged relative to each other in the event of a crash.

Furthermore, the document describes DE 10 2009 031 695 A1 a cooling module having a plurality of coolers acted upon by cooling air for vehicles, which is arranged in or on a struts having frame structure with a displacement mechanism such that the module for the purpose of inspection / cleaning or the like is displaceable.

Finally, the document shows DE 10 2006 053 883 A1 a radiator assembly for a vehicle with a water and / or intercooler and with a device for influencing the amount of air through which the radiator assembly can flow. It is envisaged that the device consists of at least two spaced apart to the water and / or intercooler module sheets arranged, of which at least one on the other is slidingly displaced locally.

It is an object of the invention to provide a coolant radiator for a motor vehicle, which has advantages over known coolant radiators, in particular realized an adjustable cooling air flow with low space requirement.

This is achieved according to the invention with a coolant radiator having the features of claim 1. It is provided that the coolant radiator has two Kühlmittelteilkühler, each having a first coolant collection box, a second coolant collection box and a plurality, the coolant collection boxes fluidly interconnected and mutually parallel radiator tubes, wherein between each two of the radiator tubes is a cooling air passage for the cooling air flow, and wherein the Kühlmittelteilkühler arranged in the direction of flow one behind the other and in a displacement direction perpendicular to the direction of flow against each other, so that in a first position of the Kühlmittelteilkühler each other, the cooling air ducts of the Kühlmittelteilkühler a first overlap and in a second position, a second overlap with each other, wherein the through the cooling air ducts Both Kühlmittelteilkühler extending cooling air path at the first overlap a first flow area and at the second overlap has a second flow cross-section.

The Kühlmittelteilkühler so far has at least two Kühlmittelteilkühler, which be displaced relative to each other, in particular by means of a drive, such as an electric, hydraulic and / or pneumatic drive. Of course, there may be more than two coolant part coolers. The coolant part coolers are essentially in the direction of flow in front of each other. Each of the coolant subcoolers has the first coolant reservoir, the second coolant reservoir, and the radiator tubes. Coolant can be supplied to the corresponding coolant part cooler via the first coolant collecting box, for example, which subsequently flows into the second coolant collecting box via the cooler tubes. For this, the coolant can be removed below.

For example, it is provided that the coolant part coolers are connected in parallel with respect to the coolant, so that in particular the coolant is supplied to the first coolant collecting boxes of the coolant part coolers and removed from the second coolant collecting boxes of the coolant part coolers. Of course, a series connection can be realized, so that the coolant is supplied to the first coolant collecting box of a first of the coolant part cooler.

The second coolant reservoir of the first one of the coolant sub-coolers is fluidly connected to the first coolant reservoir of a second of the coolant sub-radiators, so that the coolant from the second coolant reservoir into the first coolant collection box can overflow. Subsequently, the coolant flows in the direction of the second coolant collecting box of the second of the coolant part coolers or in these and can be subsequently removed from it.

In order to realize the adjustability of the cooling air flow, the Kühlmittelteilkühler are arranged in the direction of flow one behind the other and also in the direction of displacement against each other. For example, one of the coolant part coolers is stationary with respect to the motor vehicle, while the second of the coolant coolers is displaceable, namely in the mounting direction of the coolant radiator in the vertical direction, which is perpendicular or at least substantially perpendicular to the direction of flow.

Between each two of the radiator tubes, a cooling air passage is arranged for each of the coolant part coolers. Accordingly, the Kühlmittelteilkühler each have at least one cooling air duct, in particular via a plurality of cooling air ducts, which / which is in principle flowed through by the cooling air flow / are. Due to the displacement of the coolant part coolers in the direction of displacement relative to one another, the cooling air passages can be brought into different overlaps, namely at least the first overlap and the second overlap. The first overlap is in the first position and the second overlap in the second position of the coolant part cooler to each other.

The cooling air path, which runs through the radiator channels of the coolant part radiators arranged one behind the other, has the first flow cross section when the first overlap is present, and the second flow cross section when the second overlap is present. Only for the sake of completeness it should be noted that both the two positions, as well as the two overlaps and the two flow cross-sections are different from each other.

In the context of a further embodiment of the invention, it is provided that the radiator tubes of one of the coolant part coolers rest in a sealing manner on the radiator tubes of another of the coolant subcoolers in at least one position of the coolant subcooler. The coolant part coolers are thus arranged one behind the other in the flow direction or in the direction of flow, so that a cooling air duct of one of the coolant part coolers is flow-connected to a cooling air duct of the other of the coolant part coolers so that they are fluidly separated from other cooling air passages , The cooling air flows through both cooling air ducts one behind the other and is only brought together with other parts of the cooling air flow after the last of the coolant part coolers.

A preferred further embodiment of the invention provides that the first cover is larger than the second cover, so that the first flow cross section is greater than the second flow cross section. The greater the overlap of the cooling air ducts of the coolant part coolers, the greater the flow cross section. For example, the first overlap is selected such that the first flow cross-section corresponds to a maximum possible flow cross-section. By contrast, the second flow cross-section is smaller than the first flow cross-section. For example, the second cover is selected such that the cooling air path is completely blocked. The second flow area is equal to zero in this case.

A development of the invention provides that in the direction of displacement adjacent cooler tubes of the coolant part cooler have facing plane Kühlluftleitflächen, which are angled relative to the displacement direction. Seen in section, for example, the radiator tubes are rectangular or at least approximately rectangular. In this respect they have flat surfaces. Two These plan surfaces form, for example, the cooling air guide surfaces which delimit the cooling air channels. For example, each of the radiator tubes has two opposing cooling air guide surfaces, each of the cooling air guide surfaces defining one of the cooling air passages. In particular, the cooling air passages are preferably each between a Kühlluftleitfläche a first of the radiator tubes and the Kühlluftleitfläche an adjacent second of the radiator tubes. The Kühlluftleitflächen are preferably angled relative to the displacement direction, for example, they are perpendicular to the displacement direction.

In the context of a preferred embodiment of the invention, it is provided that the radiator tubes of one of the Kühlmittelteilkühler in the displacement direction have larger dimensions than the cooling air ducts of another of the Kühlmittelteilkühler, so that in at least one position of the Kühlmittelteilkühler each other, the radiator tubes of one of the Kühlmittelteilkühler the cooling air ducts of the other of the Kühlmittelteilkühler complete cover. The Kühlmittelteilkühler may have differently sized radiator tubes so far. By way of example, the radiator tubes of a coolant subcooler lying in the direction of flow at the front have smaller dimensions than the radiator tubes of a coolant subcooler lying further in the direction of flow. With such a configuration of the radiator pipes, a complete closing of the cooling air ducts can be ensured.

Finally, it may be provided that one of the coolant part coolers is fastened to displaceable guide rails. The guide rails serve to guide the coolant part cooler. For displacement, a displacement device can additionally be provided.

The invention will be explained in more detail with reference to the embodiments illustrated in the drawings, without any limitation of the invention. Showing:

1 a schematic representation of a coolant radiator for a motor vehicle,

2 a schematic sectional view of the coolant radiator, wherein two coolant part radiator of the coolant radiator in a first position to each other, as well as

3 a further schematic representation of the coolant radiator, wherein the coolant part cooler are arranged in a second position to each other.

The 1 shows a schematic representation of a coolant radiator 1 for a motor vehicle. The coolant cooler 1 is intended for direct cooling of a coolant and is in a direction of flow according to the arrow 2 acted upon by a cooling air flow along a cooling air path. The coolant cooler 1 has two coolant part coolers 3 and 4 on, which are arranged one behind the other in the direction of flow. The coolant part cooler 3 has a first coolant collection box 5 , a second coolant collection box 6 and the coolant collection boxes 5 and 6 together flow connecting radiator pipes 7 on, of which only a few are exemplified here.

Analog has the coolant part cooler 4 via a first coolant collecting box 8th , a second coolant collection box 9 and the coolant collection boxes 8th and 9 fluidically interconnecting radiator tubes 10 on. Between every two of the radiator tubes 10 lies for each of the coolant part coolers 3 and 4 a cooling air duct 11 respectively 12 in front. In the present illustration, only the cooling air channels 11 recognizable. The cooling air channels 12 lie in the flow direction behind this.

One of the coolant part coolers 3 and 4 in the exemplary embodiment of the coolant subcooler presented here 3 , Is in a direction of displacement with respect to the other coolant part radiator 3 respectively 4 displaced.

The displacement direction is preferably perpendicular to the direction of flow. The displacement direction is chosen such that the cooling air channels 11 and 12 in a first position of the coolant part cooler 3 and 4 to each other have a first overlap and therefore a first flow cross section and in a second position, a second overlap and a corresponding second flow cross section. By a shift of the coolant part coolers 3 and 4 in this respect, the throughflow cross section of the cooling air passages can be compared with one another 11 and 12 or the coolant cooler 1 be set.

The 2 shows a sectional view of the coolant radiator 1 , wherein the coolant part cooler 3 and 4 are in a first position to each other. It can be seen that each of the radiator tubes 7 and 10 two opposite plane cooling air ducts 13 and 14 having. These cooling air ducts 13 and 14 limit the cooling air channels 11 and 12 , The cooling air ducts 13 and 14 are preferably angled with respect to the displacement direction, in particular, the displacement direction is perpendicular to the Kühlluftleitflächen 13 and 14 , In the first position shown here, the cooling air channels are aligned 11 and 12 at least partially, in particular completely with each other. Accordingly, there is a first larger flow area.

The 3 shows a sectional view of the coolant radiator 1 , wherein the coolant part coolers 3 and 4 are arranged in a second position to each other. In this are the cooling air channels 11 and 12 arranged offset from one another, so that a second smaller flow cross-section of the cooling air path is given. Particularly preferred is the cooling air path through the coolant radiator 1 completely closed in the second position.

The described embodiment of the coolant radiator 1 allows adjustment of the coolant radiator 1 flowing through cooling air flow without the coolant radiator 1 in the flow direction upstream or downstream Querschnittsverstelleinrichtungen. As a result, the adjustability is realized without an increase in the space required in the flow direction.

Claims (6)

Coolant cooler ( 1 ) for a motor vehicle for direct cooling of a coolant, which can be acted upon in a direction of flow with a cooling air flow along a cooling air path, characterized in that the coolant radiator ( 1 ) two coolant part coolers ( 3 . 4 ), each via a first coolant collecting box ( 5 . 8th ), a second coolant collection box ( 6 . 9 ) as well as several the coolant collecting boxes ( 5 . 6 . 8th . 9 ) fluidly interconnecting and mutually parallel radiator tubes ( 7 . 10 ), wherein between each two of the radiator tubes ( 7 . 10 ) a cooling air duct ( 11 . 12 ) is present for the cooling air flow, and wherein the coolant subcooler ( 3 . 4 ) are arranged one behind the other in the direction of flow and are displaceable relative to one another in a direction of displacement perpendicular to the direction of flow, so that in a first position the coolant subcooler ( 3 . 4 ) to each other the cooling air channels ( 11 . 12 ) of the coolant part coolers ( 3 . 4 ) have a first overlap and in a second position a second overlap with each other, wherein by the cooling air channels ( 11 . 12 ) of both coolant part coolers ( 3 . 4 ) extending cooling air path at the first overlap has a first flow cross-section and at the second overlap a second flow cross-section. Coolant cooler according to claim 1, characterized in that the radiator tubes ( 7 . 10 ) one of the coolant part coolers ( 3 . 4 ) in at least one position of the coolant part coolers ( 3 . 4 ) sealingly against each other at the radiator tubes ( 7 . 10 ) of another of the coolant part coolers ( 3 . 4 ) issue. Coolant cooler according to one of the preceding claims, characterized in that the first overlap is greater than the second overlap, so that the first flow cross section is greater than the second flow cross section. Coolant radiator according to one of the preceding claims, characterized in that in the displacement direction adjacent radiator tubes ( 7 . 10 ) of the coolant part coolers ( 3 . 4 ) facing each other plane cooling air guide surfaces ( 13 . 14 ), which are angled relative to the displacement direction. Coolant cooler according to one of the preceding claims, characterized in that the radiator tubes ( 7 . 10 ) one of the coolant part coolers ( 3 . 4 ) have larger dimensions in the direction of displacement than the cooling air channels ( 11 . 12 ) of another of the coolant part coolers ( 3 . 4 ), so that in at least one position of the coolant subcooler ( 3 . 4 ) to each other the radiator tubes ( 7 . 10 ) of the one of the coolant part coolers ( 3 . 4 ) the cooling air channels ( 11 . 12 ) of the other of the coolant part coolers ( 3 . 4 completely cover. Coolant cooler according to one of the preceding claims, characterized in that one of the coolant part coolers ( 3 . 4 ) is attached to displaceable guide rails.

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